Full Stack Assignment Description: You need to develop a web application that maintains information of different companies and users in the relational database. Design & implement this application and demonstrate the functionality. Following is the list of functionalities that we need to implement in this application:

1. Add a Company [Name, City]
2. Add a User [Name, Email, Phone]
3. Allocate a User to one or more Companies
4. List Users [Name, Email, Phone, Allocated Companies (comma separated string)]
5. Delete a given Company
6. Get a User’s data for a given Company

Notes:

1. Implement backend for this web application.
2. Create UI for any JS framework, Responsive UI
3. Assume a suitable authentication mechanism but no need to implement it now.
4. Instead of implementing API for #1 and #2, you can populate this data in database manually.
5. It is must to implement #3 as an API.
6. You have to implement at least one API out of #4, #5 and #6.
7. Use of internet is ONLY FOR REFERENCE; copying code from any sources is STRICTLY PROHIBITED.